Peroxy compounds containing a haloformate group

ABSTRACT

A novel class of compounds Xn-Rp-Ym where R is a 2-4 valence aliphatic, cycloaliphatic or aromatic radical; X is an acylating function; Y is a peroxy containing group and n and m are each equal to 1-2 and p is at least 1. A novel class of polymers ((An-(R-Dn)n)v-P)w where A is a peroxy containing group; R is a 2-4 valence aliphatic, cycloaliphatic or aromatic radical, P is a polyvalent polymeric residue; D is a carbonyl containing connecting group; Z is H. OH, NH2, NHR2, SH or R2O group; v and w are each equal to 1-100; and n is equal to 1-2. Polymers II are useful with vinyl monomers in the formation of block and graft polymers. Peroxides having an acylating function are prepared by reacting at 0*-80* C an organic peroxide having an hydroxyl or carboxyl group with a defined acylating reactant. Peroxides having at least one acylating function are prepared by peroxidizing a compound having at least two acylating functions as the only peroxidizable substituents.

United States Patent DAngelo [4 1 June 20,1972

[54] PEROXY COMPOUNDS CONTAINING A HALOFORMATE GROUP [72] Inventor: Antonio Joseph D'Angelo, Buffalo, NY.

[73] Assignee: Pennwalt Corporation 22 Filed: May 7, 1968 211 App]. 1%.: 727,323

Related US. Application Data [63] Continuation-impart of Ser. No. 285,857, June 6,

[52] US. Cl. ..260/463, 260/2 EP, 260/ l 3, 260/75 T, 260/88.7 R, 260/93.5 R, 260/94.2 R,

260/94.7 A, 260/453 R, 260/475 P, 260/476 C,

260/485 G, 260/485 P, 260/544 Y, 260/545 R,

Primary Examiner-Lewis Gotts Assistant Examiner-Diana G. Rivers Attorney-Carl A. Hechmer, Jr.

[57] ABSTRACT A novel class of compounds X,,R,,Y,,, where R is a 2-4 valence aliphatic, cyeloaliphatic or aromatic radical; X is an acylating function; Y is a peroxy containing group and n and m are each equal to 1-2 and p is at least I.

A novel class of polymers ([A,.(R D,.),,l,-- P Z wh re A is a peroxy containing group; R is a 2 -4 valence aliphatic, cycloaliphatic or a'ro nfitic radical, P is a polyvalent polymeric residue; D is a carbonyl containing connecting group; 2 is H. OH, NH-g, Nl-lR SH or R 0 group; v and ware each equal to 1-100; and n is equal to [-2.

Polymers ll are useful with vinyl monomers in the formation of block and graft polymers.

Peroxides having an acylating function are prepared by reacting at 0-80 C an organic peroxide having an hydroxylor carboxyl group with a defined acylating reactant.

Peroxides having at least one acylating function are prepared by peroxidizing a compound having at least two acylating functions as the only peroxidizable substituents.

7 Claims, No Drawings PEROXY COMPOUNDS CONTAININGA HALOFORMATE GROUP RELATED APPLICATION This is a continuation-in-part of copending application Ser. No. 285,857, filed June 6, 1963.

BACKGROUND OF THE INVENTION t-alkyl peroxy chloroformate by reacting t-alkyl hydroperoxide with phosgene. The following derivatives were also prepared by reaction of the chloroformate with t-butyl hydroperoxide, amines and alcohols. (This type of peroxy compounds containing acylating groups do not fall within the scope of our invention because the peroxy group is not separated from the chloroformyl group and actually is a part of it.)

The di-t-alkyl peroxides containing acylating groups where R and R are lower alkyl radicals, R is lower alkyl or aromatic radical, X is either Cl or Br were prepared in US. Pat. No. 2,519,403. Derivatives prepared from the above structures were obtained by replacement of the halogen in SO- X group with hydroperoxides, alcohols, ammonia, primary and secondary amines in US. Pat. No. 2,542,578. (These compounds do not fall within the scope of this invention because the connecting link is SO rather than Di-t-aralkyl peroxides containing as acylating groups represented by the following structure:

l- 1 ':-o-ol t f t'1 v .v

where R is the same or different alkyl radical and y is group were prepared in US. Pat. No. 3,165,546.

The above peroxy compounds do not come within this invention. They have many disadvantages:

1. They are too thermally stable to be useful for vinyl polymerization.

2. When reacted with polymers containing more than two functional groups, the polymer obtained is a crosslinked one which is not useful for block and graft work due to the inherent .insolubility of crosslinked polymer in most organicsolvents.

3 They can only be used in condensation reaction to prepare polyesters, polyamides, etc. and even in applications such as these, the resultant polymer, in order to be useful for block and graft work, an outside source of radiation has to be used in order to decompose the peroxide.

4. They do not offer a wide range of operating temperature which is so important when working with the preparation of graft and block copolymers from different vinyl monomers.

With peroxidic materials one of ordinary skill in the art would not use the reactionconditions necessary to convert any peroxy compound containing carboxylic or alcohol groups to the desired corresponding acid halide, anhydride and chloroformate. He would expect decomposition of the peroxide to take place especially with peroxides of the diperketals, perester, and diacyl type.

SUMMARY OF THE INVENTION 1. A class of compounds having at least one peroxy group and at least one acylating function defined by the following general formula:

n p m where:

l. R is an aliphatic, cycloaliphatic or aromatic radical having 2-4 valences available for X and Y;

2. p is an integer equal to at least 1;

3. X is selected from the class consisting of 4. Bis Clor Br; 5. Y is selected from the class consisting of na t- 6. R is a tertiary alkyl group having 4-8 carbon atoms;

7. R is aliphatic radical of one to 12 carbons or cycloaliphatic of three to 12 carbons.

8. R is t-alkyl or aralkyl each having not more than 10 carbon atoms;

9. R is aliphatic radical of one to 12 carbons; cycloaliphatic radical of three to 12 carbons; or aromatic radical of six to 12 carbons.

11. A polymer, containing at least one peroxide group, having the formula n n)n ]v )u- Z where: l A is selected from the class consisting of a): H O (l) m-oo-n R,--c-, ZP-D-R -00- i Z-P-D 43-02 -oo- R l; 00 J; 1%

and i (I) (R91 (R7): 0 z-P-D-R-d-oo-c-(GHi)qo-00- 2. (P )D is selected from the class consisting of r l i 0 Jz-o-r, -0-i2-0-P-, -CN-P-, O -NP R; O R: O O

. P is a v l valent polymeric residue;

. Z is selected from the class consisting of H, OH, NH

NHR SH, and R O-;

. v is an integer equal to 1-100;

. w is an integer equal to 1-100;

. n is an integer equal to l-2;

. R is an aliphatic, cycloaliphatic or aromatic radical having 2-4 valences;

9. R is t-alkyl having 4-8 carbon atoms;

10. R is aliphatic radical of one to 12 carbons or cycloaliphatic of three to 12 carbons.

11. R is r-alkyl or aralkyl each having not more than 10 carbon atoms; and

12. q is an integer equal to 2-4.

111. The invention includes a method of preparing block and graft polymers by reacting a vinyl-type monomer with polymer 11 under conditions to decompose the peroxide. Example: A block polymer is prepared by forming a styrene solution, 15 parts by weight, and the polymer product of hydroxyl terminated polybutadiene and bis(4-ch1oroformylbutyryl) peroxide, five parts by weight, and heating said mixture for about seven hours at 70-l00 C, under an inert atmosphere.

1V. The invention includes a method of preparing a'peroxide having an acylating function by reacting an organic peroxide having at least one reactive group, capable of being converted to an acylating function, selected from the class consisting of carboxyl and hydroxyl, said reactive group being the only group in said peroxide capable of reacting with the acyl function forming reactant; with an acyl function forming reactant selected from the class consisting of CO(B),, P(B) P(B) PO(B) 80(8):, 80 (3), where B is selected from the class consisting of C l and Br; at a temperature between about 0 C and 80 C, said maximum temperature being controlled to avoid substantial decomposition of the peroxy groups present in the reaction zone.

V. The invention includes a method for preparing a peroxide having at least one acylating function of the general fonnula X,,-R,,-Y',,, by peroxidizing a compound having at least two acylating functions, as the only peroxidizable substituents,

oo-imm AU) under conditions to prepare a peroxide product having at least DESCRIPTION OF THE INVENTION AND EXAMPLES Compounds 1 In the compound X,,R,,-Y,,,, R is aliphatic, cycloaliphatic or aromatic having 2-4 valences available for X and Y. More commonly these are hydrocarbon radicals of these types. Desirably the aliphatic hydrocarbon radical has 1-20 carbon atoms preferably this is an alkyl radical. Desirably the cycloaliphatic hydrocarbon radical having 4-10 ring carbon atoms preferably this is a cycloalkyl radical. Desirably the aromatic hydrocarbon radical has one or two benzene rings, which can be condensed as in naphthenylene or joined as in biphenylene.

X is an acylating function which may be acyl chloride or bromide; chloro or bromoformate; or anhydro. Where X is anhydride, R must be a tri or tetravalent radical.

Y is a peroxy containing group, as defined in the summary herein. Some of the defined groups also include an acylating function X, affording a compound having a multiplicity of acylating functions.

It and m are integers each equal to 1-2; n and m need not be equal to each other.

R is a tertiary alkyl group having 4-8 carbon atoms. This is to be understood as where R is alkyl.

R, is an aliphatic group having 1-12 carbon atoms or cycloaliphatic group having 3-1 2 carbon atoms.

R is an aliphatic radical of one to 12- carbons,

cycloaliphatic radical of three to 12 carbonsor an aromatic Compounds 1" are set out in the Examples Section herein.

Compounds A are useful initiators for the polymerization of vinyl-type monomers. Compounds A can be reacted with polymeric materials containing terminal or pendant hydroxyl, amino, and mercapto groups or any other functionality that can be acylated. (Examples I, II, III, IV). Compounds containing two acylating groups can be reacted with difunctional monomers to obtain condensation polymers like: polyesters, polyamides, etc. (Example VI) containing intermittant peroxy groups along the polymer backbone. These peroxy compounds containing acylating groups are useful as intermediate for the preparation of other derivatives and they will undergo any reaction where acid halides, haloformates and anhydrides are normally used.

Polymers II In the polymer ([A,.-RDn]vP){ Z as defined in the summary the remarks made under Compound I in this description with respect to the various R radicals are applied to polymer II herein.

2" is a terminal or pendant group selected from the group I-I, -OI-I, -NI-I NI-IR -SH and --OR.

q is an integer equal to 2-4.

n is an integer equal to l-2 and the various ns in the polymer formula need not have the same value.

In order to show the attachment of P" to the D" group in the polymer, D" is defined as (P- )D as set forth in the II of the summary herein.

v and w" are integers each equal to 1-100; they may have the same or different values.

P is a v l valent polymeric residue such as a polyether, polyester, polyamide, polycarbonate, polybutadiene, polystyrene, poly(vinyl alcohol), partially hydrolyzed poly(vinyl acetate), cellulose, polybutadiene-polystyrene copolymer, and any other polymeric material. More specifically polyether containing aliphatic, cycloaliphatic, aromatic, and heterocyclic diradicals linked to the oxygen atoms; polyester, such as prepared from aliphatic, cycloaliphatic, aromatic, and heterocyclic dibasic acids and dihydroxy compounds; polyamide, such as prepared from aliphatic, cycloaliphatic, aromatic, and heterocyclic dibasic acids and diamines; polycarbonate, such as prepared from aliphatic, cycloaliphatic, aromatic, and heterocyclic dihydroxy compounds and phosgene or aliphatic, cycloaliphatic, aromatic and heterocyclic bis(chloroformates).

.A" is a peroxy containing group as defined in II in the summary.

Polymer II can be prepared by reaction with polymeric materials containing terminal or pendant hydroxyl, amino, and mercapto groups or any other functionality that can be acylated. Preparations are illustrated by Examples I, II, III, and IV. Polymers II can be used to prepare graft and block polymers with vinyl monomers by decomposing the peroxide present in the polymer (Example VII, VIII, IX, XI).

Polymers II can be used in making graft and block polymers. These block and graft copolymers are useful as compatibilizing agents. The great majority of homopolymers are incompatible with each other. However, when block and/or graft copolymers of two incompatible homopolymers are present,

the system becomes much more, if not completely, compatibilized (see Examples VIII and IX).

Ill. Method of Preparing Block and Graft Polymers Any of the conventional procedures for decomposing the peroxide, such as heating to the proper temperature, activation with amines or transition metal salts, and ultra violet irradiation can be used.

Illustrative block and graft polymers are prepared in Examples VII, VIII, IX and XI.

It is known that when two different polymers are brought in solution really a dispersion because of the low solubility of polymer in the common organic solvents in a common solvent, over a period of time the solution segregates into two layers, having different polymeric compositions. Apparently homogeneous melts of two different polymers frequently on solidifying show undesired segregation or heterogeneous dispersion of one polymer throughout the continuous phase of the other polymer. Since physical mixtures (dispersion) of two different polymers afford very desirable physical properties, if a homogeneous mass is maintained, stability of the dispersion is of importance. A thir component of the mix which improves the dispersion stability of the mix is known as a stabilizer in certain special areas, the stabilizer is referred as a compatibility agent.

The ability to stabilize is tested in the laboratory by empiri-- cal tests where the stabilized" solution is compared to a control solution. The time for the appearance of two distinct layers is measured. It is to be emphasized that the results cannot be used to compare effectiveness in different polymeric systems, since even polymer molecular weight can cause substantial changes in separation time between two systems made from the same monomers. However the laboratory tests are meaningful in terms of screening potential stabilizers.

An important utility of the block and graft polymers made by the method of the invention is as stabilizers (compatibilizers) of solutions of different homopolymers. This utility is demonstrated by Examples VIII and IX.

IV. Method of Preparing Compound I It has been discovered that compounds having both at least one peroxy group and at least one acylating function are produced by the acylation of a peroxide having a hydroxyl or carboxyl group. No other group capable of reacting with the acylating agent is present in the peroxide reactant.

The acyl function forming reagent is phosgene (COCI COBr phosphorus trichloride, phosphorus tribromide, phosphoruspentachloride, phosphorus pentabromide, sulfuryl chloride, sulfuryl bromide, thionyl chloride, or thionyl bromide.

The acylation reaction is carried out at a temperature suitable for the reaction but controlled to avoid substantial decomposition of the peroxy groups present in the reaction zone. The temperature will vary for particular reactant systems but, in general, falls in the range of about 0 to C.

The method IV invention is illustrated by Procedures I, II and III in the Examples herein.

V. Method of Preparing Compounds It has been discovered that compounds having both, at least one peroxy group and at least one acylating function are prepared by peroxidizing a compound having at least two acylating functions, as the only peroxidizable substituents using the agent in an amount such that at least one acylating function is not peroxidized. The class of compounds possible by this method have the general formula X,,-R,,Y',,, where X, R, n, m and p have the definitions set out in respect to Compound I. Y' includes all the members set out in the definition of Y except for The peroxidizing agent may be a suitable organic hydroperoxide or in some instance an alkali metal peroxide.

EXAMPLES Compounds of the invention containing an acylating group and a peroxy group were prepared by one of the following procedures:

Example of Procedure 1 Preparation of t-butyl o-(chloroformyl)peroxybenzoate To a suspension of t-butyl o-( carboxy )peroxy-benzoate (16.2g. 0.06 moles) in 100 ml. of benzene at +6 C to +24 C but preferably at +6 C to +10 C was added in a single portion phosphorous pentachloride 12.6g. 0.06 moles).

The mixture was stirred for two hours or longer at +24 C to +80 C but preferably at +24 C to +40 C.

At the end of the reaction period the mixture was diluted with ice-water and the organic phase separated, washed to neutrality, dried over anhydrous magnesium sulfate, filtered and the solvent evaporated under reduced pressure.

A viscous liquid was obtained 14g.

Calculated yield for C l-l Cl O 15. 1 g. or 92.7 percent of the theory. S.P.l, at 1 15 C gave: Gel Time 6.3 min.; Cure Time 7.9; Peak "F 443 Calculated A(O) 6.24 percent. Found 5.95 percent or 95.5 percent pure.

Example of Procedure 11 Preparation of 2-(t-butylperoxycarbonyl)ethyl chloroformate To 75 ml. of pentane at -1 0 C to C was added 39.6g. of

phosgene. To this mixture was added a mixture of t-butyl-3- hydroxyperoxypropionate (38g. 0.2 moles of 85 percent pure products) and pyridine (15.8g. 0.2 moles) in diethyl ether over a period of one hour.

The reaction temperature during the addition was controlled at -10 C to +20 C but preferably at 0:tl C.

After the addition was completed the mixture was allowed to stir for minutes while the reaction temperature was allowed to rise to +25 C 1 1 C.

After filtration of the pyridine hydrochloride the mixture was stripped under reduced pressure. The residue was dissolved in diethyl ether and washed with a 10 percent solution of tartaric acid, 10 percent solution of sodium bicarbonate and water to neutrality. The ether solution was dried over anhydrous magnesium sulfate, filtered and the solvent evaporated under reduced pressure. A liquid was obtained, (40g.).

Theoretical yield for C l-1 C 10 44.9g. or 89 percent of the theory. Calculated A(O) 7.15 percent. Found A(O) 6.84 percent, calculated percent C1 15.8 percent found 12.7 percent.

Example of Procedure [11 Preparation of bis(4-chloroformylbutyryl) peroxide ll H A mixture of glutaric acid peroxide (10.5g. 3.04 moles) and thionyl chloride (30 ml.) at 0 C to +30 C preferably at +10 C to +24 C was treated with one drop or more of pyridine. The mixture was allowed to react for 24 hours or longer at +30 C to C but preferably at +30 C to +40 C. After 5 this time the mixture was evaporated under reduced pressure.

A viscous liquid was obtained, (9g.).

Calculated yield for G l-1 C1 0, 11.9g. or 75.6 percent of the theory.

Calculated A(O) 6.35 percent, found A(O) 5.11 percent. Calculated percent Cl 23.9 found Cl 25.2 percent.

Compounds prepared by one of these procedures are tabulated in Table I.

'lAllIrll l Analysis, .lvrcvnt ()lilori- Percent. nating yield Tlicor. Found 'llioor. Found Names and structure agent uncorr. Purity 0 O (.1 Cl

(H) Tl) COCl: 89.0 95.6 7.15 6.84 15.8 12.7 (CH3)3C-O-0CCH2-CII2OCC1 2-(t-butylperoxycarbonyl)-cthyl chloroformate.

(I) PC1 92. 7 .15. 5 6. 24 5.115 CO-O-C(CII3)3 l.-liul. vl n-(clllorolorniyl)pnroxylmnzontc.

(I) PO15 62 7. 35 1. 5 16. 3 10.1 (Jl-() -(J()()C(G1I;);

((llla)s(1()()-(l CCl ll II [)i-L-hutyl 2,5-tli(uhlorol'orinyl) di-poroxy-torphtlnilate.

([3 (CH3): (i) (l l (ll-L (III: -(lII2-.0(J--Cl COCl 10.2 10.14 11.2 10.6

TABLE I-Continued Analysis, Percent Chlori- Percent hating yield Theor. Found Theor. Found Names and structure agent uncorr. Purity O C1 C1 3, 3-di(t-huty1peroxy)butyl ehlorolormateo mm-pm,muwww AAH v Q 7 ll COOC(CH3) C-Cl (l -Butyl 2-(ch0r0formyl)-hexahydroperoxybenzoate.

l l (CHa)s-COOCCH=CHCCl 3(t-butylperoxycarbonyl)-acry1oy1chloride. in V I I cls 98.5 7 7 7.59 cH=):cooc-cmcH -C-c1 3-(t-butylperoxycarbonyl)-propionyl chloride.

0 0 SOClz 95.5 5.35 5.11 23.9 25.2 [I ll (Cl*C-CHr-CHzCH2C-0)2 Bis(4'chlorotormylbutyryl)peroxide.

(311 C00]; 14.01 11.7 CH3 l:CH2( :HCH3

l C=0 i C(CH2): Cl 1,3-dimethyl-3-(t-buty1per0xy)butyl chlorotormate.

Analysis, J 0mm Percent COOCOCHCH -C-Cl nating Yield Pur- Theor. Found 40 l agent uncorr. ity C1 C1 311 C H; c0012 84 04.2 11.15 11.2 0 CHa-?--CH2 ::H

O 0 I H I l 0 i cr-wmn-coocomma (3:0 Cl 0 Pol ers of the invention and the utilit of certain com- 4 9 ym y pounds of the Invention is illustrated by the following working 1,3-dimethyl- -(nbutoxycarhonylperoxy) examples butyl chlorolorrnate.

Exam lel D Other compounds that can be prepared by conventional methods are:

Reaction of cellulose with 2-(t-butylperoxycarbonyl)- ethyl chloroformate 2.5g. of cellulose powder (Fisher filtration accelerator NO 9-906) was treated with 20 ml. of sodium hydroxide (50 percent) and allowed to stand overnight.

The following day the mixture was filtered and the solid suspended in water and reacted with 43. of 2-(t-butylperoxycarbonyl) ethyl chloroformate and allowed to stir for 24 hours at +40 C to C but preferably at +40 C to +50 C. After this time the mixture was filtered and the solid washed with benzene and diethyl ether and air dried.

A solid (53.) was obtained containing 0.12 percent A(0).

EXAMPLE 11 Reaction of hydroxyl-terminated polybutadiene with To a mixture of 17.6g. of hydroxyl-terminated polybutadiene liquid resin (Sinclair R-l M resin equivalent weight 1330, containing 0.75 meq. 01-1 per gram), diethyl ether and triethylamine 1 .4g .0132 moles) was added a solution of 2-(tbutylperoxycarbonyl)-ethyl chloroformate (3.8g. of 90 percent product, 0.0132 moles) in diethyl ether. The mixture was reacted for four hours at +20 C to +100 C but preferably at +20 C to +40 C.

After filtration of the triethylamine hydrochloride and evaporation of the solvent a viscous liquid was obtained 14g.) that contained 0.91 percent A(O).

SP1 exotherrn in polyester resin at 115 C and 2 percent concentration gave the following:

Gel Time in Minutes 5.4 Cure Time in Minutes 7.5 Peak in F 428 EXAMPLE lll Reaction of hydroxyl terminated polybutadiene with t-butyl o(chlorofonnyl)peroxybenzoate Polybutadlene To a solution of 17.6g. of a hydroxyl-terminated polybutadiene liquid resin (equivalent weight l330g. containing 0.75 meq/g) and triethylamine 1.4g. 0.0132 moles) in diethyl ether was added a solution of t-butyl o-(chloro-formyl)peroxybenzoate (0.0132 moles) in benzene.

After filtration of the triethylamine hydrochloride and evaporation of the solvent a viscous liquid was obtained 16g.) that contained 0.27 percent A(O).

SP1 exotherm in polyester resin at 115 C and 2 percent concentration gave the following:

Gel Time in Minutes Cure Time in Minutes Peak in F EXAMPLE IV Preparation of polyether containing an acylperoxy group EXAMPLE v Reaction of hydroxyl-terminated polybutadiene with bis( 4- chlorofonnylbutyrl) peroxide in presence of ethanol.

To a solution of 35.2g. of hydroxyl-tenninated polybutadiene (Sinclair R-l5 M resin) and 2g. (0.0264 moles) of triethylamine in diethyl ether was added a solution of bis(4- chloroformylbutyryl) peroxide (96.7 percent) (4.7g. 0.0132 moles) in diethyl ether.

After the addition was completed, absolute ethanol was added (1.2g. 0.0264 moles). The mixture was reacted for two hours. After filtration of the triethylamine hydrochloride, the ether solution was evaporated under reduced pressure. A viscous liquid was obtained (37g.) containing 0.30 percent A(O).

n is greater than 1 in the product formula.

EXAMPLE VI Preparation of polyester containing peroxide 3 o 0 0OC(CH|)1 H O[ I]: E

(CHQAO (GHQ): 0 lu u 1133M?L -C 0(OH|)| To 2.7g. (0.03 moles) of 1,4-butanediol and 7.5g. (0.075

moles) of triethylamine dissolved in diethyl ether was added a solution of 1.9g. (0.005 moles) t-butyl 2,4(5)-( dichloroformyl)peroxybenzoate and 3.9g. (0.025 moles) of succinoyl dichloride in benzene.

After filtration of the triethylamine hydrochloride, the organic phase was stripped under vacuum. A viscous residue was obtained. SPl exotherm in polyester resin at 1 15 C and l percent concentration gave the following:

Gel Time in minutes 4.1 Cure Time in minutes 6.5 Peak in F 385 EXAMPLE Vll Preparation of block copolymer with styrene from product prepared in Example I Cellulose(polystyrene) To 15 ml. of styrene placed in a tube was added 0.5g. of the product prepared in Example 1. The tube was sealed under an atmosphere of nitrogen and heated for six hours at +60 C to +1 00 C.

The reaction product was then extracted with chloroform for 24 hours then dried under vacuum at 50 C for six hours.

The block copolymer formation was confirmed by pyrolysis analysis with Vapor Phase Chromatography (Perkin-Elmer 154 model). The cellulose containing peroxide (Example I) was pyrolyzed and the gases passed through a 6 ft. column of diisodecyl phthalate 10 low 4X). The chromatogram showed peaks at 1.75; 1.85; 1.95; and 2.25 minutes.

Similarly polystyrene was pyrolyzed. The chromatogram showed peaks at 1.8; 3.4; 4.7; and a major peak between at 9.3 and 10.3 minutes.

EXAMPLE VIll Preparation of block copolymer with styrene from product obtained in Example IV.

Polyether-Polystyrene To 15g. of styrene placed in a tube is added g. of the product obtained on Example IV. The tube is sealed under a nitrogen atmosphere and heated for seven hours at C to +100 C. The polymer obtained from the reaction is dissolved in benzene and precipitated with odorless mineral spirit. The formation of the block copolymer is demonstrated by the demixing test" similar to those of Hughes and Brown 4) and Molau (5): (4) L. J. Hughes and G. L. Brown, J. Appl. Polymer Sci. 7-59 (1963); (5) G. E. Molau, .l. Polymer Sci A3- l 267 1965 The control is a 50/50 mixture of 40 percent polystyrene and 40 percent solution of a monohydroxyl terminated polyether (Carbowax-750) in chloroform solution. After these were well mixed the demixing time was 30 minutes. A 40 percent solution of the block prepared in chloroform showed no demixing in 22.5 hours.

A mixture of 1:1:1 of 40 percent solutions of polystyrene, Carbowax-750 and the prepared block in chloroform after they were well mixed showed a demixing time of 90 minutes.

EXAMPLE 1X Preparation of block copolymers with styrene from product obtained in Example V.

Polystyrene-Polybutadiene To g. of styrene placed in a tube is added 5g. of the product obtained on Example V. The tube is sealed under a nitrogen atmosphere and heated for seven hours at +70 C to +100 C. The polymer obtained from the reaction is dissolved in benzene and precipitated with odorless mineral spirit. The olymer is dried in a vacuum oven for sixteen hours at +50 C and tested by the demixing test. (4)-(5).

The control is a 50/50 mixture of 15 percent polystyrene and 15 percent hydroxyl terminated polybutadiene in benzene solution. After these are well mixed, a demixing time of twenty minutes was obtained. A 15 percent solution of the block 1 copolymer showed no demixing in 13 days. A mixture of 121:] of 15 percent solutions of polystyrene, hydroxyl terminated polybutadiene and the block copolymer in benzene gave a demixing time ofsix hours.

EXAMPLE x Reaction of hydroxy-terminated polybutadiene-styrene with tbutyl o-( chloroformyl )peroxybenzoate To a solution of 176g. of hydroxyl-terminated polybutadiene polystyrene copolymer (Sinclair C-S-15 resin, equivalent weight 1330) containing 0.75 meq/gm) and triethylamine (1.4g. 0.0132 moles) in diethyl ether was added a solution of t-butyl o-(chloroformyl) peroxybenzoate (0.0132 moles) in benzene.

After filtration of the triethylamine hydrochloride and evaporation of the solvent a viscous liquid was obtained 16g.)

that contained 0.43 A(O).

EXAMPLE Xl Preparation of block copolymer with acrylonitrile from the copolymer containing peroxide ln Example X.

Polybutadiene-Polystyrene-Polyacrylonitrile After this time the two solutions were cooled down to 23-25 C and contrifugated for 4 hours. The blank failed to give any solid while the other sample separated 7g. of polyacrylonitrile.

The toluene solution after separation of the solid was precipitated with methanol and 12g. of solid was obtained. The increase weight of the soluble polymer was a proof of the block formation.

What is claimed is:

l. A peroxide, containing at least one acylating function having the formula: X,, R Y,,, where:

l. R is an aliphatic, cycloaliphatic or aromatic radical having 2 4 valences available for X and Y;

2. p is an integer equal to at least 1:

(3) X is 6. R is a tertiary alkyl group having 4 8 carbon atoms;

7. R, is an alkyl radical having 1 12 carbon atoms;

8. R is t-alkyl or aralkyl each having not more than 10 carbon atoms;

9. R is an alkyl radical having 1 12 carbon atoms or an aryl radical having 6 12 carbon atoms;

10. n is an integer equal to 1 2;

l5 l6 1 l, m is an integer equal to l 2; and 7. A method of preparing a peroxide having a haloformate l 2. q is an integer equal to 2 4. function with method comprises: The P of Claim 1 Where R is aliphatic y reacting an organic peroxide having at least one hydroxyl bon having 1-20 Car n a m group, said hydroxyl group being the only group in said t 5 peroxide capable of reacting with the haloformate forming reactant; if H with a haloformate forming reactant CO(B),, where B is |)n -CC iCHaO-C-Cl selected from C1 and Br;

' at a temperature between about 0 C and 80 C., the max- 1, m y y p y)b y ChlOIOfOrmaW- imum temperature being controlled to avoid substantial 5- 3,3- ylp xy) y chlofofolmatedecomposition of the peroxy groups present in the reac- 6. 1,3-Dimethyl-3-(n-butoxycarbonylperoxy) butyl gi zone,

chloroformate. a s i. a

5l52 101041 nnn UNITED STATES PATENT OFFICE EERTIFICATE OF CORRECTION Patent No. 6551 Dated Tune 20, 1972 Inventor) Antonio Ioseph D'Angelo, Buffalo, N. Y,

It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

Column 14, line 35, insert after "function"; line 45, delete u v "-C-B or"; line 46, "Cl or Br=" should read (31- or Br line 60, that portion of the last formula reading l 0 should read C l l 2 in 2 Column 16, line 7, "O C" should read lO C Signed and sealed this 27th day of February 1973.,

(SEAL) Attest:

EDWARD M.FLETCHER,JR. ROBERT GOTTSCHALK Commissioner of Patents Attesting Officer 

2. The compound of claim 1 where R is aliphatic hydrocarbon having 1-20 carbon atoms.
 3. 2. p is an integer equal to at least 1:
 4. 1,3-Dimethyl-3-(t-butylperoxy)butyl chloroformate.
 5. 3,3-Di(t-butylperoxy)butyl chloroformate.
 6. 1,3-Dimethyl-3-(n-butoxycarbonylperoxy) butyl chloroformate.
 6. R1 is a tertiary alkyl group having 4 - 8 carbon atoms;
 7. R2 is an alkyl radical having 1 - 12 carbon atoms;
 7. A method of preparing a peroxide having a haloformate function with method comprises: reacting an organic peroxide having at least one hydroxyl group, said hydroxyl group being the only group in said peroxide capable of reacting with the haloformate forming reactant; with a haloformate forming reactant CO(B)2, where B is selected from Cl and Br; at a temperature between about 0* C and 80* C., the maximum temperature being controlled to avoid substantial decomposition of the peroxy groups present in the reaction zone.
 8. R3 is t-alkyl or aralkyl each having not more than 10 carbon atoms;
 9. R4 is an alkyl radical having 1 - 12 carbon atoms or an aryl radical having 6 - 12 carbon atoms;
 10. n is an integEr equal to 1 - 2;
 11. m is an integer equal to 1 - 2; and
 12. q is an integer equal to 2 -
 4. 